Processing of high-performance Gd-Ba-Cu-O bulk superconductor with Ag addition

被引：61

作者：

Nariki, S ^{[1
]}

Sakai, N ^{[1
]}

Murakami, M ^{[1
]}

机构：

[1] ISTEC, Superconduct Res Lab, Minato Ku, Tokyo 1050023, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2002年 / 15卷 / 05期

关键词：

D O I：

10.1088/0953-2048/15/5/302

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We fabricated large-grain c-axis-oriented Gd-Ba-Cu-O bulk superconductors with very fine 211 particles and studied their field-trapping properties. Single domain Gd-Ba-Cu-O/Ag bulk samples with different molar ratios of Gd-123:Gd-211 = 10:x (x = 2 to 6) were melt-textured under controlled oxygen partial pressure of 1.0% by employing Gd-211 starting powders with a particle size of 1.0 mum. The maximum trapped magnetic field of 2.0 T was recorded at 77 K in the bulk 48 mm in diameter with the composition of x = 5. It is notable that the trapped field in the space of two Gd-Ba-Cu-O bulks reached an extremely high value of 3.3 T at 77 K. Furthermore, the field-trapping performance of the bulk sample was Improved by applying the ultra-fine 211 powders of a size of 0.2 mum. The single-bulk Gd-Ba-Cu-O 50 mm in diameter exhibited a trapped field of 2.6 T at 77 K.

引用

页码：648 / 652

页数：5

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